Confused

Kristen • Married in September. I have a 3 year old and me and my husband are having our first together but yet he treats him good
Please no judgment. I love my husband but an old bf messaged me on fb and he's getting divorced and I went to hang out with him and support him and what not and all my feelings rushed back like I was never away from him and I hadn't seen him it 2-3 years till yesterday! I have never felt this way with my husband and I do love him but it's to the point I'm miserable making him happy. I'm 10 weeks 3 days pregnant and starting to think I married the wrong person! Has anyone went through this before and what did you do?! And please no rude comments or judgment I really just need help!